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Mercury, lead, and cadmium in blue crabs, Callinectes sapidus, from the Atlantic coast of Florida, USA: a multipredator approach.

Ecotoxicology and environmental safety (2014-02-11)
Douglas H Adams, Marc E Engel
ABSTRACT

Blue crabs, Callinectes sapidus, from the Atlantic coast of Florida were analyzed for total mercury, methylmercury, lead, and cadmium. Paired samples of two tissue types were analyzed for each crab, (1) muscle tissue (cheliped and body muscles) and (2) whole-body tissue (all organs, muscle tissue and connective tissue), for evaluation of the concentration of metals available to human consumers as well as estuarine predators. There were clear patterns of tissue-specific partitioning for each metal. Total mercury was significantly greater in muscle tissue (mean=0.078 µg/g) than in whole-body tissue (mean=0.055 µg/g). Conversely, whole-body concentrations of lead and cadmium (means=0.131 and 0.079 µg/g, respectively) were significantly greater than concentrations in muscle (means=0.02 and 0.029 µg/g, respectively). There were no significant correlations between any metal contaminant and crab size. Cadmium levels were significantly greater in the muscle tissue of females, but, no other sex-related differences were seen for other metals or tissue types. Methylmercury composed 93-100% of the total mercury in tissues. Compared to previous blue crab studies from different regions of the United States, mean concentrations of mercury, lead, and cadmium were relatively low, although isolated groups or individual blue crabs accumulated high metal concentrations.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Lead, shot, <2 mm, 99.9% trace metals basis
Sigma-Aldrich
Mercury, electronic grade, 99.9999% trace metals basis
Sigma-Aldrich
Lead, powder, −100 mesh, 99.95% trace metals basis
Sigma-Aldrich
Lead, shot, 1-3 mm, 99.995% trace metals basis
Sigma-Aldrich
Mercury, ≥99.99% trace metals basis
Sigma-Aldrich
Mercury, ACS reagent, 99.9995% trace metals basis
Lead, foil, light tested, 50x50mm, thickness 0.05mm, as rolled, 97% (Sn 1.5%, Sb 1.5%)
Lead, foil, not light tested, 25x25mm, thickness 0.0125mm, 99.99+%
Lead, foil, light tested, 25x25mm, thickness 0.01mm, 99.99+%
Lead, foil, not light tested, 150x150mm, thickness 0.025mm, 99.99+%
Lead, foil, light tested, 50x50mm, thickness 0.008mm, 99.99+%
Lead, foil, not light tested, 25x25mm, thickness 0.0025mm, temporary acrylic support, 99.99+%
Lead, foil, not light tested, 100x100mm, thickness 0.025mm, 99.99+%
Lead, foil, not light tested, 150x150mm, thickness 0.05mm, as rolled, 97% (Sn 1.5%, Sb 1.5%)
Lead, foil, light tested, 25x25mm, thickness 0.008mm, 99.99+%
Lead, foil, not light tested, 150x150mm, thickness 0.05mm, as rolled, 96% (Sn 1.5%, Sb 2.5%)
Lead, foil, not light tested, 100x100mm, thickness 0.004mm, 99.99+%
Lead, foil, not light tested, 25x25mm, thickness 0.009mm, 99.99+%
Lead, wire reel, 0.1m, diameter 1.0mm, as drawn, 99.99+%
Lead, wire reel, 0.1m, diameter 2.0mm, as drawn, 99.99+%
Lead, foil, light tested, 25x25mm, thickness 0.04mm, 99.99+%
Lead, rod, 200mm, diameter 19.0mm, 99.95%
Lead, wire reel, 0.1m, diameter 0.5mm, as drawn, 99.99+%
Lead, foil, not light tested, 50x50mm, thickness 0.005mm, 99.99+%
Lead, wire reel, 0.5m, diameter 0.5mm, as drawn, 99.999%
Lead, microfoil, disks, 10mm, thinness 0.1μm, specific density 103.4μg/cm2, permanent mylar 3.5μm support, 99.99+%
Lead, tube, 100mm, outside diameter 6.78mm, inside diameter 4.7mm, wall thickness 1.04mm, 99.9%
Lead, tube, 200mm, outside diameter 6.78mm, inside diameter 4.7mm, wall thickness 1.04mm, 99.9%
Lead, foil, not light tested, 250x300mm, thickness 0.025mm, as rolled, 97% (Sn 1.5%, Sb 1.5%)
Lead, microfoil, disks, 10mm, thinness 1.0μm, specific density 1047.8μg/cm2, permanent mylar 3.5μm support, 99.99+%